Datasheet TDA2050 Datasheet (UNISONIC TECHNOLOGIES CO)

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UNISONIC TECHNOLOGIES CO., LTD

TDA2050 LINEAR INTEGRATED CIRCUIT

32W HI-FI AUDIO POWER AMPLIFIER

 DESCRIPTION

The UTC TDA2050 is a monolithic integrated circuit with high

power capability and is designed to use as an class AB audio amplifier. It can deliver typically 50W music power into 4Ω load

over 1 sec at V

The device is most suitable for both Hi-Fi and high class TV sets on the strength of its high supply voltage and very low harmonic and crossover distortion.

=22.5V, f = 1KHz.

S

 FEATURES

1

TO-220B

* High output power (50W Music Power IEC 268.3 Rules)

* High operating supply voltage (50V) * Single or split supply operations * Very low distortion * Short circuit protection (OUT to GND) * Thermal shutdown

 ORDERING INFORMATION

Ordering Number

Normal Lead Free Plating

Package Packing

TDA2050-TB5-T TDA2050L-TB5-T TO-220B Tube

 PIN CONFIGURATION

5

4

3

2

1

*Pb-free plating product number: TDA2050L

+V

S

OUTPUT

-V

S

INVERTING INPUT

NON INVERTING INPUT

*TAB CONNECTED TO PIN 3

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TDA2050 LINEAR INTEGRATED CIRCUIT

 BLOCK DIAGRAM

5

SHORT

CIRC.

PROTECT.

4

V

REF

SHORT

CIRC.

PROTECT.

3

21

UNISONIC TECHNOLOGIES CO., LTD 2

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TDA2050 LINEAR INTEGRATED CIRCUIT

 ABSOLUTE MAXIMUM RATINGS

PARAMETER SYMBOL RATINGS UNIT Supply Voltage VS ±25 V Input Voltage VIN V Differential Input Voltage V Output Peak Current (internally limited) I

Power Dissipation TC= 75℃

±15

IN(DIFF)

5

OUT

P

25 W

D

Junction Temperature TJ +125 Storage Temperature T

-40 ~ +150

STG

Note:1.Absolute maximum ratings are those values beyond which the device could be permanently damaged.

Absolute maximum ratings are stress ratings only and functional device operation is not implied.

2.The device is guaranteed to meet performance specification within 0℃~70℃ operating temperature range

and assured by design from –40℃~85℃.

 THERMAL DATA

PARAMETER SYMBOL RATINGS UNIT

θ

Thermal Resistance junction-case

 ELECTRICAL CHARACTERISTICS

JC

S

℃ ℃

3 ℃/W

(Refer to the Test Circuit, V

= ±18V, Ta = 25℃, f = 1 kHz, unless otherwise specified.)

S

PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT

Supply Voltage VS ±4.5 ±25 V

18

Quiescent Drain Current ID

V

= ±4.5V

S

V

= ±25V

S

21

50 90

mA

Input Bias Current IB VS = ±22V 0.4 0.5 µA Input Offset Voltage V Input Offset Current I

D = 0.5%

RMS Output Power

D = 10%

Music Power IEC268.3 RULES

VS = ±22V ±15 mV

IN(OS)

VS = ±22V ±200 nA

IN(OS)

27

= 4Ω

R

L

R

= 8Ω

L

R

= 8Ω, VS = ±22V

L

P

O

= 4Ω

R

L

R

= 8Ω

L

R

= 8Ω, VS = ±22V

L

D = 10%, T = 1s, V

= ±22.5V, RL = 4Ω 50

S

24

22

18 25 35 22 32

W

RL = 4Ω

Total Harmonic Distortion THD

f = 1kHz, P f = 100Hz ~ 10kHz, P R

= 8Ω, VS = ±22V

L

f = 1kHz, P f = 100Hz ~ 10kHz, P

= 0.1 ~ 24W

O

= 0.1 ~ 20W

O

= 0.1 ~ 18W

= 0.1 ~ 15W

0.03 0.5

0.5

0.02

0.5

%

Slew Rate SR 5 8 V/µs Open Loop Voltage Gain GV 80 dB Closed Loop Voltage Gain GV 30 30.5 31 dB Power Bandwidth (-3dB) BW RL = 4Ω, VIN= 200mV 20 ~ 80000 Hz

Total Input Noise eN

Curve A B = 22Hz ~ 22kHz

4 5 10

µV

Input Resistance (pin 1) RIN 500 kΩ Supply Voltage Rejection SVR RS = 22KΩ, f =100Hz, V

Efficiency η

PO = 28W, RL = 4Ω 65 P

= 25W, RL = 8Ω, VS = ±22V 67

O

=0.5Vrms 45 dB

RIPPLE

%

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TDA2050 LINEAR INTEGRATED CIRCUIT

 TYPICAL APPLICATION CIRCUIT

FOR SPLIT SUPPLY APPLICATION SUGGESTIONS

+V

S

C1

22μF

V

IN

R1

22kΩ

R2

680Ω

C2

22μF

Figure.1 Split Supply Typical Application Circuit

The following table demonstrates the recommended values of the external components are those shown

on above circuit. Different values can be used.

COMPONENT PURPOSE

R1 Input Impedance 22kΩ

R2 Feedback Resistor 680Ω Decrease of Gain* Increase of Gain R3 22kΩ Increase of Gain Decrease of Gain* R4 Frequency Stability 2.2Ω Danger of Oscillations C1 Input Decoupling DC 1µF Higher Low-frequency cut-off

C2

C3, C4 Supply Voltage Bypass 100nF Danger of Oscillations C5, C6 Supply Voltage Bypass 220µF Danger of Oscillations

C7 Frequency Stability 0.47µF Danger of Oscillations

* The gain must be higher than 24dB

Inverting Input DC Decoupling

C5 220μF

1

2

5

+

UTC

4

TDA2050

-

3

TYPICAL LARGER SMALLER

22µF

R3

22kΩ

C4 100nF

RECOMMENDED VALUE

Increase of Input Impedance Decrease of Input

Increase of Switch ON/OFF Noise

C3 100nF

R4

2.2Ω

C7

0.47μF

C6 220μF

R

L

-V

S

Impedance

Higher Low-frequency cut-off

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TDA2050 LINEAR INTEGRATED CIRCUIT

 TYPICAL APPLICATION CIRCUIT(CONT.)

FOR SINGLE SUPPLY APPLICATION SUGGESTIONS

+V

S

C2

1000μF

22kΩ

IN

R1

C1

2.2μF

R2 22kΩ

1000μF

R3

22kΩ

C4

22μF

C3

1

2

R4 680Ω

5

+

UTC

TDA2050

3

R5

22kΩ

C5 100nF

4

R6

2.2Ω

C6

0.47μF

C7

1000μF

R

Figure.2 Single Supply Typical Application Circuit

The following table demonstrates the recommended values of the external components are those shown

on above circuit. Different values can be used.

COMPONENT PURPOSE

R1, R2, R3 Biasing Resistor 22kΩ

R4 Feedback Resistor 22kΩ Increase of Gain Decrease of Gain* R5 680Ω Decrease of Gain* Increase of Gain R6 Frequency Stability 2.2Ω Danger of Oscillations C1 Input Decoupling DC 2.2µF Higher Low-frequency cut-off

C2

C3 Supply Voltage Bypass 1000µF

C4

C5 Supply Voltage Bypass 100nF Danger of Oscillations C6 Frequency Stability 0.47µF Danger of Oscillations C7 Output DC Decoupling 1000µF Higher Low-frequency cut-off

* The gain must be higher than 24dB

NOTE: If the supply voltage is lower than 40V and the load is 8Ω(or more), a lower value of C2(i.e. 22µF) can be

used. C7 can be larger than 1000µF only if the supply voltage does not exceed 40V.

Supply Voltage Rejection

Inverting Input DC Decoupling

TYPICAL LARGER SMALLER

100µF

22µF

Worse Turn-off Transient Worse Turn-on Delay

Increase of Switch ON/OFF

RECOMMENDED VALUE

Danger of Oscillations Worse of Turn-off Transient

Higher Low-frequency cut-off

L

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TDA2050 LINEAR INTEGRATED CIRCUIT

 TYPICAL CHARACTERISTICS (Split Supply Test Circuit, unless otherwise specified)

Output Power vs. Supply Voltage

40

RL= 8Ω f = 1kHz

35

Output Power vs. Supply Voltage

40

RL= 4Ω f = 1kHz

35

30

THD = 10%

25

(W)

20

O

P

+

15

10

5

0

10 20

15

V

(V)

S

Quiescent Current vs. Supply Voltage

60

RL= 4Ω

55

50

45

40

(mA)

D

I

35

30

25

20

10 20

15

V

(V)

S

THD = 0.5%

2550

30

25

(W)

20

O

P

THD= 10%

15

10

5

0

10 20

15

V

(V)

S

Total Power Dissipation and Efficiency

vs. Output Power

40

VS= 18V

35

R

= 4Ω

L

f = 1kHz

30

25

20

(W)

D

P

15

10

5

0

10 20

15

P

O

2550

(W)

THD= 0.5%

2550

m

P

D

30 35

30

4030

80 70 60 50

40 30 20 10 0

m (%)

Total Power Dissipation and Efficiency

vs. Output Power

VS= 22V

28

R

= 8Ω

L

f = 1kHz

24

20

16

(W)

D

P

12

m

P

D

8

4

0

10 20

15

P

O

(W)

2550

30 35

80 70 60 50

40 30 20 10 0

m (%)

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TDA2050 LINEAR INTEGRATED CIRCUIT

UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.

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